Denmark Aktiesparekonto Calculator: Share Savings Account Growth
Estimate what a Danish aktiesparekonto (ASK) grows to from regular contributions at a steady return — the share savings account that taxes gains at a low flat rate instead of the high ordinary share tax.
Adjust the inputs and select Calculate for a full breakdown.
Year-by-year growth schedule
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Future value | Total contributions | Total interest earned |
|---|---|---|---|
| 1k/mo · 6% · 15yr | $290,818.71 | $180,000.00 | $110,818.71 |
| 0 + 2k/mo · 6% · 20yr | $924,081.79 | $480,000.00 | $444,081.79 |
| 50k + 1.5k/mo · 7% · 10yr | $360,110.28 | $230,000.00 | $130,110.28 |
| 500/mo · 5% · 25yr | $297,754.85 | $150,000.00 | $147,754.85 |
How This Calculator Works
Enter your current ASK balance, monthly contribution, the return you expect, and the years invested. The calculator compounds the balance monthly and shows the projected value and the growth. The ASK's appeal is its low tax: gains are taxed at a reduced flat rate (17%) rather than the much higher rates on ordinary share income — though the tax is charged annually on the gain (lagerbeskatning), even if unrealised.
The Formula
Future Value with Regular Contributions
P = starting amount, PMT = monthly contribution, r = monthly rate (annual ÷ 12), n = number of months
Worked Example
1,000 kr a month for 15 years at 6% grows to about 290,819 kr, with roughly 110,819 kr of that being growth — before the annual 17% lager tax. The aktiesparekonto (ASK) is a Danish investment account introduced to encourage retail share ownership. Its key feature is a reduced flat tax of 17% on returns, well below the ordinary Danish share-income tax (which is 27% up to a threshold and 42% above it). The trade-off: the ASK is taxed on a mark-to-market basis (lagerbeskatning), so gains are taxed each year as they accrue, not only when you sell — and there's a cap on how much you can deposit.
Key Insight
The aktiesparekonto is Denmark's flagship low-tax retail investment account, and its tax design is the whole point. The headline benefit is the reduced rate: returns inside an ASK are taxed at a flat 17%, far below the ordinary Danish aktieindkomst (share-income) tax of 27% up to an annual threshold and 42% above it — so for many investors the ASK roughly halves the tax on share gains. The catch is the taxation method: the ASK uses lagerbeskatning (mark-to-market / inventory taxation), meaning your gains are taxed every year based on the change in the account's value, whether or not you've sold anything — unlike a normal taxable account where share gains are typically taxed only on realisation. This annual taxation slightly reduces compounding versus a pure tax-deferred account, but the low 17% rate usually more than compensates. There's a deposit ceiling: you can only pay in up to a maximum total (the cap has been increased over time and there have been moves to raise it further), which limits the ASK to being one part of a larger portfolio for bigger investors. You can hold listed shares and equity-based investment funds in it, switch and rebalance freely (since gains are taxed annually anyway), and losses inside the ASK can be offset against future ASK gains. This calculator gives a gross, constant-return projection and omits the 17% lager tax and any fees; in practice subtract roughly 17% of each year's gain for the tax drag, respect the deposit cap, and weigh the ASK's low rate against an ordinary depot account (higher rate but realisation-based taxation) and pension accounts for your overall plan.
Frequently Asked Questions
How is aktiesparekonto growth calculated?
Your balance and monthly contributions compound at the expected return (annual rate ÷ 12 per month). 1,000 kr/month for 15 years at 6% grows to about 290,819 kr, with roughly 110,819 kr of growth — before the annual 17% lager tax on gains.
What is an aktiesparekonto?
A Danish share savings account (ASK) designed to encourage retail investing. Its defining feature is a reduced flat tax of 17% on returns — well below the ordinary Danish share-income tax of 27%/42%. You can hold listed shares and equity funds, with a cap on how much you can deposit.
Why is the tax method important?
Because the ASK uses lagerbeskatning (mark-to-market taxation): gains are taxed each year based on the change in account value, even if you haven't sold. That's different from a normal account where share gains are taxed only when realised. It slightly reduces compounding, but the low 17% rate usually outweighs that.
Is there a deposit limit?
Yes — the ASK has a maximum total you can pay in, a ceiling that has been raised over time (with moves to increase it further). This caps how much of your portfolio can enjoy the 17% rate, so larger investors use the ASK alongside ordinary accounts and pension schemes. This calculator doesn't enforce the cap.
Is the ASK better than an ordinary account?
Usually for the tax rate — 17% versus 27%/42% on ordinary share income is a big saving. The main downsides are the deposit cap and the annual mark-to-market taxation (you pay tax on unrealised gains). For most retail investors the low rate wins, but it depends on your amount and how you'd otherwise be taxed.
Related Calculators
Methodology & Review
The future value compounds a starting balance plus a fixed monthly contribution at the annual return, compounded monthly. It assumes a constant return and end-of-month deposits, and does not enforce the ASK contribution ceiling, model fees, or deduct the 17% lager (mark-to-market) tax charged annually on gains.
Written by Ugo Candido · Last updated May 22, 2026.